需要项目源码请点赞关注收藏后评论区留言并且私信~~~

一、项目简介

前后端分离的核心思想时前端页面通过掉用后端的RESTfulApI进行数据交互。本次项目使用Spring Boot+Spring Data JPA实现后端系统，使用Vue.js实现前端系统，数据库采用mysql，集成开发环境为Intellij IDEA

二、名片系统功能介绍

名片系统是针对注册用户使用的系统有以下几种功能

1：非注册用户可以注册为注册用户

2：成功注册的用户可以登录系统

3：成功登录的用户，可以添加，修改，删除以及浏览自己客户的名片信息

三、构建后端系统cardmis

1：修改pom.xml

添加mysql依赖和热部署依赖具体代码如下

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ch</groupId>
    <artifactId>cardmis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>cardmis</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.30</version>
        </dependency>

        <!-- 热部署 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2：配置数据源信息

在配置文件application.properties中配置端口号数据源以及文件上传等信息


server.port=8443
###
##数据源信息配置
###
#数据库地址
spring.datasource.url=jdbc:mysql://localhost:3306/card?characterEncoding=utf8
#数据库用户名
spring.datasource.username=root
#数据库密码
spring.datasource.password=root
#数据库驱动
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#要导入驱动包
#数据库MySQL为8.x时，驱动类为com.mysql.cj.jdbc.Driver
####
#JPA持久化配置
####
#指定数据库类型
spring.jpa.database=MYSQL
#指定是否在日志中显示SQL语句
spring.jpa.show-sql=true
#指定自动创建、更新数据库表等配置，update表示如果数据库中存在持久化类对应的表就不创建，
#不存在就创建对应的表
spring.jpa.hibernate.ddl-auto=update
#上传文件时，默认单个上传文件大小是1MB，max-file-size设置单个上传文件大小
spring.servlet.multipart.max-file-size=50MB
#默认总文件大小是10MB，max-request-size设置总上传文件大小
spring.servlet.multipart.max-request-size=500MB

3：创建持久化实体类

根据名片系统功能可知，名片系统一共有两个实体：用户和卡片，并且是一对多的关系，因此后端系统的持久化实体类一共有两个分别为UserEntitiy和CardEntity

用户实体类代码如下

package com.ch.cardmis.entity;
import java.util.List;
import java.io.Serializable;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@Entity
@Table(name = "user_table")
@JsonIgnoreProperties(value = { "hibernateLazyInitializer"})
public class UserEntity implements Serializable{
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;//主键
    private String uname;
    private String upwd;
    //名片列表，用户与名片是一对多的关系
    @OneToMany(
            mappedBy = "user",
            cascade=CascadeType.ALL,
            targetEntity = CardEntity.class,
            fetch=FetchType.LAZY
    )
    private List<CardEntity> cardEntityList;

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUname() {
        return uname;
    }
    public void setUname(String uname) {
        this.uname = uname;
    }
    public String getUpwd() {
        return upwd;
    }
    public void setUpwd(String upwd) {
        this.upwd = upwd;
    }

    public List<CardEntity> getCardEntityList() {
        return cardEntityList;
    }

    public void setCardEntityList(List<CardEntity> cardEntityList) {
        this.cardEntityList = cardEntityList;
    }
}

卡片实体类代码如下

package com.ch.cardmis.entity;
import java.io.Serializable;
import javax.persistence.*;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@Entity
@Table(name = "card_table")
@JsonIgnoreProperties(value = { "hibernateLazyInitializer"})
public class CardEntity implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;//主键
    private String name;
    private String telephone;
    private String email;
    private String company;
    private String post;
    private String address;
    private String logo;
    //所属用户，名片与用户是多对一的关系
    @ManyToOne(cascade={CascadeType.MERGE,CascadeType.REFRESH},optional=false)
    //可选属性optional=false,表示用户不能为空。删除名片，不影响用户
    @JoinColumn(name="id_user_id")//设置在card_table表中的关联字段(外键)
    @JsonIgnore
    private UserEntity user;
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getTelephone() {
        return telephone;
    }

    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getCompany() {
        return company;
    }

    public void setCompany(String company) {
        this.company = company;
    }

    public String getPost() {
        return post;
    }

    public void setPost(String post) {
        this.post = post;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getLogo() {
        return logo;
    }

    public void setLogo(String logo) {
        this.logo = logo;
    }

    public UserEntity getUser() {
        return user;
    }

    public void setUser(UserEntity user) {
        this.user = user;
    }

}

4：创建Repository持久层

后端系统的数据访问是基于Spring Data JPA的，数据访问接口需要继承Repository接口，与持久化实体类一样，同样有用户和卡片两个数据访问接口

用户访问接口代码如下

package com.ch.cardmis.repository;

import com.ch.cardmis.entity.UserEntity;
import org.springframework.data.jpa.repository.JpaRepository;

public interface UserRepository extends JpaRepository<UserEntity, Integer> {
    /**
     * 查询用户名是否已存在
     */
    public UserEntity findByUname(String uname);

    /**
     *登录
     */
    public UserEntity  findByUnameAndUpwd(String uname, String upwd);
}

卡片访问接口代码如下

package com.ch.cardmis.repository;

import com.ch.cardmis.entity.CardEntity;
import org.springframework.data.domain.Sort;
import org.springframework.data.jpa.repository.JpaRepository;

import java.util.List;

public interface CardRepository extends JpaRepository<CardEntity, Integer> {
    //根据用户id查询该用户的名片
    public List<CardEntity>  findByUser_id(Integer id, Sort sort);
}

5：创建业务层

在Spring框架中提倡使用接口，因此在业务层中涉及Service接口和Service实现类代码如下

卡片实现类

package com.ch.cardmis.service;

import com.ch.cardmis.entity.CardEntity;
import com.ch.cardmis.entity.UserEntity;
import com.ch.cardmis.repository.CardRepository;
import com.ch.cardmis.util.MyUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpSession;
import java.io.File;

@Service
public class CardServiceImpl implements CardService {
    @Autowired
    private CardRepository cardRepository;
    @Override
    public String add(CardEntity cardEntity, HttpSession session, MultipartFile file) {
        if("noLogin".equals(isLogin(session))){
            return "noLogin";
        }else{
            UserEntity user = (UserEntity)session.getAttribute("user");
            cardEntity.setUser(user);
            //防止文件名重名
            String newFileName = "";
            if(file != null){
                String fileName = file.getOriginalFilename();
                newFileName = MyUtil.getNewFileName(fileName);
                String realpath = "C:\\Users\\ChenHeng\\IdeaProjects\\cardmis-vue\\cardmis-vue\\static";
                File targetFile = new File(realpath, newFileName);
                if(!targetFile.exists()){
                    targetFile.mkdirs();
                }
                //设置文件名
                cardEntity.setLogo("static/" + newFileName);
                //上传
                try {
                    file.transferTo(targetFile);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            cardRepository.save(cardEntity);
            return "ok";
        }
    }
    @Override
    public Object cards(HttpSession session) {
        if("noLogin".equals(isLogin(session))){
            return "noLogin";
        }/*
         else {
            Sort sort = new Sort(Sort.Direction.DESC, "id");
            UserEntity user = (UserEntity)session.getAttribute("user");
            return cardRepository.findByUser_id(user.getId(), sort);
        }
         */
        return null;
    }
    @Override
    public String delete(HttpSession session,Integer cid) {
        if("noLogin".equals(isLogin(session))){
            return "noLogin";
        }else {
            cardRepository.deleteById(cid);
            return "ok";
        }
    }
    @Override
    public Object aCard(HttpSession session, Integer cid) {
        if("noLogin".equals(isLogin(session))){
            return "noLogin";
        }else {
            return cardRepository.getOne(cid);
        }
    }
    @Override
    public String isLogin(HttpSession session) {
        Object user = session.getAttribute("user");
        if(user == null)
            return "noLogin";
        return "yes";
    }


}

用户实现类

package com.ch.cardmis.service;
import com.ch.cardmis.entity.UserEntity;
import com.ch.cardmis.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;

@Service
public class UserServiceImpl implements  UserService {
    @Autowired
    private UserRepository userRepository;
    @Override
    public String register(UserEntity requestUser) {
        UserEntity ue = userRepository.findByUname(requestUser.getUname());
        if(ue != null)
            return "no";
        else{
            userRepository.save(requestUser);
            return "yes";
        }
    }
    @Override
    public String login(UserEntity requestUser, HttpSession session) {
        UserEntity ue = userRepository.findByUnameAndUpwd(requestUser.getUname(), requestUser.getUpwd());
        if(ue != null){//登录成功
            session.setAttribute("user", ue);
            return "ok";
        }
        return "no";
    }
}

6：创建控制器层

卡片控制器

package com.ch.cardmis.controller;

import com.ch.cardmis.entity.CardEntity;
import com.ch.cardmis.service.CardService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpSession;

@RestController
public class CardController {
    @Autowired
    private CardService cardService;
    @CrossOrigin//跨域访问
    @PostMapping(value = "cardmis/add")
    public String add(CardEntity cardEntity, HttpSession session, MultipartFile file) {
        return cardService.add(cardEntity, session, file);
    }
    @CrossOrigin//跨域访问
    @GetMapping(value = "cardmis/cards")
    public Object cards(HttpSession session) {
        return cardService.cards(session);
    }
    @CrossOrigin//跨域访问
    @PostMapping(value = "cardmis/delete")
    public String delete(HttpSession session,Integer cid) {
        return cardService.delete(session,cid);
    }
    @CrossOrigin//跨域访问
    @GetMapping(value = "cardmis/aCard")
    public Object aCard(HttpSession session,Integer cid) {
        return cardService.aCard(session,cid);
    }
}

用户控制器

package com.ch.cardmis.controller;

import com.ch.cardmis.entity.UserEntity;
import com.ch.cardmis.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpSession;

@RestController
public class UserController {
    @Autowired
    private UserService userService;
    @CrossOrigin//跨域访问
    @PostMapping(value = "cardmis/register")
    public String register(@RequestBody UserEntity requestUser) {
        return userService.register(requestUser);
    }

    @CrossOrigin//跨域访问
    @PostMapping(value = "cardmis/login")
    public String login(@RequestBody UserEntity requestUser, HttpSession session) {
        return userService.login(requestUser, session);
    }
}

7：创建跨域响应头设置过滤器

8：创建工具类

后端系统项目目录结构如下

后面几个类代码省略不表 有需要请点赞关注收藏后评论区留言并且私信

四、构建前端系统cardmis-vue

Node.js与Vue.js的部署请参考我这篇博客此处不再赘述

Vue环境部署

项目结构目录如下

开发前端页面

在开发的时候，前端用前端的服务器开发，后端用后端的服务器开发。当开发前端内容时，可以把前端的请求通过前端服务器转发给后端，即可实现观察结果，并且不需要知道后端怎么实现，而只需要知道接口提供的功能，前后端的开发人员各司其职

部分Vue代码如下

<template>
  <div class="active">
    <NavMain></NavMain>
    <h3>添加名片</h3>
    <form>
    姓名：<input type="text" v-model="name" placeholder="请输入用户名"/><br><br>
    电话：<input type="text" v-model="telephone" placeholder="请输入电话"/><br><br>
    邮箱：<input type="text" v-model="email" placeholder="请输入邮箱"/><br><br>
    单位：<input type="text" v-model="company" placeholder="请输入单位"/><br><br>
    邮编：<input type="text" v-model="post1" placeholder="请输入邮编"/><br><br>
    地址：<input type="text" v-model="address" placeholder="请输入地址"/><br><br>
    头像：
    <input  type="file"  @change="getFile($event)"/><br><br>
    <button type="button" @click="add($event)" :disabled="isDisable">添加</button>
    <button type="reset">重置</button>
    </form>
    <br>
  </div>
</template>
<script>
  import NavMain from '@/components/NavMain'
  export default {
    name: 'Add',
    components: {NavMain},
    data () {
      return {
        isDisable:false
      }
    },
    methods: {
      //获得文件对象
      getFile(event) {
        this.file = event.target.files[0];
      },
      add (event) {
        this.isDisable = true;
        event.preventDefault();
        let formData = new FormData();
        formData.append('name', this.name === undefined ? '': this.name);
        formData.append('telephone', this.telephone === undefined ? '': this.telephone);
        formData.append('email', this.email === undefined ? '': this.email);
        formData.append('company', this.company === undefined ? '': this.company);
        formData.append('post', this.post1 === undefined ? '': this.post1);
        formData.append('address', this.address === undefined ? '': this.address);
        formData.append('file', this.file === undefined ? null: this.file);
        let config = {
          headers:{'Content-Type':'multipart/form-data'}
        };
        this.$axios
          .post('/add', formData, config)//直接提交表单
          .then(successResponse => {
            if (successResponse.data === "ok") {
              alert("添加成功")
              this.$router.replace({path: '/main'})
            }else if(successResponse.data === "noLogin"){
              alert("没有登录，请登录！")
              this.$router.replace({path: '/login'})
            }else {
              alert("添加失败")
              this.isDisable = false
            }
          })
          .catch(failResponse => {
            alert("响应异常")
          })
      }
    }
  }
</script>
<style>
  .active {
    background-image: url("../assets/bb.jpg");
  }
</style>

同样还有修改路由配置，使用钩子函数判断是否登录等操作此处不再赘述